http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Aluminium and titanium alloys surface behaviour under argon and helium ion exposure
Bizyukov, I.,Girka, O.,Kaczmarek, Ł.,Klich, M.,Myroshnyk, M.,Januszewicz, B.,Owczarek, S. Elsevier 2018 Nuclear instruments & methods in physics research. Vol.436 No.-
<P><B>Abstract</B></P> <P>Samples of aluminium alloy 2024 and titanium alloy Ti-6Al-4V are irradiated with 2 keV helium (He) and argon (Ar) ion fluxes using FALCON ion source. Cone-like structures are found to be formed on the surface of two Al(2024) samples due to both irradiation conditions: Ar and He ions exposure reaching total fluence 9.75 × 10<SUP>25</SUP> m<SUP>−2</SUP> and total charge 150 Coulomb per sample. Ar ions exposure of Ti-6Al-4V causes cones formation, while exposure for He ions causes only physical sputtering morphology at the same fluence. Chemical composition of grown structures is obtained from energy dispersive spectroscopy (EDS). Surface roughness and roughness profile are investigated with confocal microscope. Hardness of irradiated surfaces is obtained from results of Vickers hardness test. Residual stresses after irradiation and phase composition are measured by X-ray Diffraction spectroscopy (XRD). The mechanisms of cones growth on alloys surface are surface radiation-stimulated diffusion and ion induced collision cascades evolution.</P>
Ion induced millimetre-scale structures growth on metal surfaces
Girka, O.,Bizyukov, O.,Balkova, Y.,Myroshnyk, M.,Bizyukov, I.,Bogatyrenko, S. Elsevier 2018 Nuclear instruments & methods in physics research. Vol.420 No.-
<P><B>Abstract</B></P> <P>Polished polycrystalline Plansee tungsten (W) sample with purity 99.99 wt% and 0.75 mm thickness has been exposed to intense argon (Ar) ion beam with average energy of 2 keV and etched through in the centre. As a result, castle-like structures with strong asymmetry and with the height of >200 µm have been formed. Structures can be observed by naked eyes and with scanning-electron microscopy (SEM). It has been revealed, that the structures have been formed not immediately, but at the later stages of irradiation. Primary factors favouring the formation for the structures are relaxation of the surface stresses and activated surface mobility of atoms.</P>